Pulping-engine



(N0 Model.)

G. MIL LE R. PULPING ENGINE.

Patented Nov. 14,- 1893.

' Invader Gfuyorv JVLIZZbL' Zyihc' viii-arrows U ITED STATES PATENT uric.

GUYON MILLER, OF DOWNINGTOWN, PENNSYLVANIA.

PULPING-ENGINE.

SPECIFICATION forming part of Letters Patent No. 508,734, dated November 14:, 1893. V Applioatien filed January 16,1893 Serial No. 458,515. (No model.)

To all whom it may concern:

. Be it known that I, GUYON MILLER, a citizen of the United States, and a resident of Downingtown, Chester county, Pennsylvania, have invented certain Improvements in Pulping- Engines, of which the following is a specification.

My invention relates to certain improvements in the pulping engine described and claimed in the patent granted to me on the 6th day of September, 1892, No. 482,184, and

the object of my present invention is to energize the current in the machine so that the material will be fed to the upper blades more rapidly. This object I attain in the following manner, reference being had to the accompanying drawing in which the figure is a longitudinal sectional view of the machine.

In treating paper stock in a pulping engine it is necessary to carry the material a certain distance in the water before bringing it in contact with the blades a second time, so as to thoroughly min the material and present new fiber or new surfaces to the action of the blades, and consequently in this machine where the disintegratingis done at two points,

it is not only desirable but essential that the the other of the tub or casing, and is situated near the middle of the tub. The roll is mounted in suitable bearings supported in any manner, but I preferably use the support shown in the patent mentioned above. The roll is driven in the direction indicated by its arrow.

D are the lower blades, and D are the upper blades. These blades act with the roll to disintegrate or draw out the fibers of the pulp.

E is the forward mid-feather, inclined from a point adjacent to the roll, down to a point near one end of the tub, presenting an inclined plane for the material to travel upon from the upper discharge point, preventing the rolling of the stock in the tank at the point where it leaves the blades.

F is the rear mid-feather, and this midfeather is also inclined from the roll down toward the opposite end of the tub. A lip f' depends from the lower inner edge of this mid-feather, and is placed as near as possible to theblades, so as to direct the material as it is thrown from the bladesby the centrifugal action of a roll to and through the channel w communicating with the rear space W at one end of the machine.

G is a back fall situated at the rear of the roll. Its forward face or surface 9 is so inclined that it acts as an inclined way to lead the matarial up to the apex g into the channel w. The rear surface g of this back fall is also inclined downward preferably at a greater degree than the mid-feather, making the channel to tapering. Consequently. as the material is thrown out by the roll into the channel w, it naturally propels with great force the material ahead of it, driving the same up and around the end f of the midfeather, after which said material is caused in part by the pressure behind it, and in part by the action of the roll, at the upper part of the machine, to pass between said roll and the upper blades.

I preferably extend the framing of the upper blades D rearwardly as shown, so as to form a hood at having a curved under surface, so that as the blades of the roll strike the pulp and throw it at a tangent, the pulp will strike the hood a, and the curveof the latter is such that the pulp will be thrown into the channel between the roll and the upper blades. The bottom of the forward end of the tub is inclined toward the lower blades as shown in the drawing, and the discharge pipe I is attached to the bottom of the tub directly back of the back fall.- The rear end of the tub as well as the forward end of the tub, is curved, not only to allow for the easy flow of material, but also forming with the back fall, a funnel-shaped discharge for the material, so that when it is wished to empty the tub the valve vlis opened, and the material escapes through the outlet, and the materialin the forward end of the tub flows by gravity toward the roll which discharges it into the space w, from which point it flows by gravity to the outlet.

I claim as my invention 1. The combination in a pulping engine, of the casing, the disintegrating roll, blades thereon, upper and lower disintegrating blades acting in conjunction with said roll, a forward mid-feather and a rear mid'fea'ther, said mid-feather forming upper and lower passages, with a back fall in the lower passage directly back of the roll, substantially as described.

2. The combination in a pulping engine, of the casing, the disintegrating roll, blades thereon, upper and lower blades acting in conjunction with said roll, a mid-feather back of the roll forming upper and lower passages, and inclined from a point at the roll to a point some distance beyond the same, with a back fall directly back of the roll, forming with the mid-feather a contracted channel for the material as it passes away from the lower side of the roll, substantially as described.

3. The combination of the casing, the roll, upperand lower blades, a mid-feather in front of the roll forming an upper and lrwer passage, said mid-feather being inclined from a point adjacent to the roll down to a point near the forward end of the casing, and presenting an inclined plane for the material to travel upon from the upper discharge point, substantially as described.

4. The combination of the casing, the roll, upper and lower blades, aforward mid-feather and a rear mid-feather, said mid-feathers forming upper and lower passages, with a hood projecting rearwardly and downwardly from the roll and the upper blades, substantially as described.

5. The combination of the casing, the roll, blades acting in conjunction with said roll,a back fall, and a transverse mid-feather forming upper and lower passages, said midfeather having a lip f at the roll, substantially as described.

6. The combination of the casing, the roll situated near the center of the tub, blades acting in conjunction with said roll, transverse mid-feathers forming upper and lower passages for the material on both sides of the roll, a back fall at the rear of the roll and in the lower pas age, the bottom of the casing in front of the roll being inclined toward the blades in the lower passage, with a discharge opening in the bottom of the tub directly back of the mid-feather, the rear end of the tub being inclined toward the discharge opening so that when it is wished to empty the tub, the material in the forward end of the tub will flow to the roll and be discharged thereby into the space back of the roll which is drained on opening the outlet valve, substantially-as described.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

GUYON MILLER.

Witnesses:

HENRY HoWsoN, JOSEPH H. KLEIN. 

